Groudon-Primal @ Choice Band  
Ability: Tough Claws  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Flip Turn  
- Headlong Rush  
- Ice Hammer  
- Bolt Strike  

Slowbro-Mega @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Scald  
- Extrasensory  
- Circle Throw  
- Mortal Spin  

Arceus-Fighting @ Ability Shield  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Combat Torque  
- Jungle Healing  
- Teleport  
- Strength Sap  

Alakazam-Mega @ Choice Specs  
Ability: Beads of Ruin  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Volt Switch  
- Psycho Boost  
- Moongeist Beam  
- Fleur Cannon  

Registeel @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk / 0 Spe  
- U-turn  
- Revelation Dance  
- Nuzzle  
- Dragon Tail  

Audino-Mega @ Covert Cloak  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
- Moonblast  
- Rapid Spin  
- Haze  
- Shore Up